F1 layer critical frequency, foF1
Scalable foF1 values do not occur very frequently. In December and January,
foF1 was only seen 5 percent of the time at either site.
Throughout the following months, the occurrence steadily increases, until by
April, foF1 can be scaled 45 percent of the time. A lack of common data makes
the comparison of the two sites very sketchy indeed in December and January
1993. From February onwards however, more points are available, and the
comparison reveals a systematic offset between the data, more points lying
below the expected line than above. This can be seen most clearly from the plot of all the data. With such a small number of points, the gradient is influenced
by the few values at the low frequency end of this graph.
Results
- Spring Equinox
- Summer Solstice
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15/05/97 Chris Davis